Grate for stoves



(No Model.) l y H. GRAEF.

` GRATE POR STOVES, 8vo.

Patented Aug. 22, 1893.

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Unire STATES PATENT Frio.

HERMAN GRAEF, OF ALBANY, NEV YORK.

GRATE FOR STOVES, 80C.

SPECIFICATION forming part of Letters Patent No. 503,699, dated August22, 1893.

Application filed February 3, 1892. Serial No. 420,149. (No model.)

To all whom it may'concern:

Beit known that I, HERMAN GRAEF, a citizen of the United States,residing at Albany, in the county of Albany and State of New York, haveinvented certain new and useful Improvements in Grates for Stoves,Ranges, and Furnaces; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to improvementsin grates for stoves, ranges vandfurnaces; and it consists of the combinations of devices and elementshereinafter particularly described, and specifically set forth in theclaim.

The objects of my invention are to provide for use in stoves, ranges,and furnaces, a grate formed by a main grate section, which is looselymounted by its end portions on a shaft which is supported in suitablebearings provided in the grate frame, and a sub-grate section which isso connected with the said shaft, on which said main grate section ismounted, as to be oscillated, at will, without oscillating said maingrate section,forloosening the ashes and clinkers supported by said maingrate section, and be made, at will, to tilt the said main grate sectionfor dumping the same; and also to provide specific means by which myinvention may be embodied in grates. I attain these objects by the meansillustrated in the accompanying drawings forming a part of thisspecification in which-- Figure 1 is a plan view of a grate embodying myimprovements. Fig. 2 is a view of the same taken in the transverse atline l-l in Fig. l; and Fig. 3 is a section taken at line 2--2 in Fig.1.

The same letters of reference refer to similar parts throughout theseveral views.

In the drawings A is the re box which may be made of metal or re brickor both combined.

B is the grate frame which is preferably made to consist of asingleppiece, though it may be made in sections, and may be made withany form of construction as may be calculated to adapt it for use in thestove or furnace to which my invention is to be applied.

C is the main grate section composed of the side bars c c, end bars c cand the series of cross bars c2 c2 all preferably integral, andcomposing a single piece. The cross bars c2 c2 connecting by their endswith the side bars c c are made preferably with the form shown in Figs.2 and 3; that is to say, the middle portion of these cross bars c2 c2are made with a convex bent form, while their portions, between the saidside bars and said convex portion are made with concave bent form.

E is the sub grate section which is composed of a series of lingers orbars, preferably slightly concave on their upper sides, and anoscillating shaft as shaft D, preferably integral with said radial barsor fingers e e so as to constitute a single piece.

Provided with the end portions of the grate frame B are bearings a o,Figs. 1 and 3, which are sunken below the plane of the lower side of themain grate section and in which the ends of the shaft D, of thesub-grate section, is loosely mounted, so that said shaft and itsconnected radial bars or lingers e e may be freely oscillated at will.

At near one end of the shaft D is provided an enlarged or annularprojection d intervening between an end portion c of the main gratesection, and a cross bar c2 neighboring said end portion c'forpreventing,r said subgrate section E from shifting endwise inrelation to the main grate section. A stop l), Fig. 3, connected withthe lower side of the grate frame B, prevents the heavier half portionof the main grate section C from dropping down. A squared or catchingend d2 is provided on said shaft D, for receiving or holding with asuitable wrench or lever for oscillating the same, and the radial barsor fingers e e of the grate section E connected with said shaft.

Projecting from the lower side of theend bars c c', of the main gratesection C, are bearingspb b2 preferably integral with said end bars c.These bearings b b2 receive the shaft D of the sub-grate section E, asillustrated in Figs. l and 2, and retain the series of cross bars c2 c2,at their middle portions, on

a plane relatively above the said shaft, so

that the latter will be substantially free from contact with the saidcross bars of the main grate section, and thereby preserve the saidshaft substantially out of contact with the fire above the grate.

TOO

Provided between two of the cross bars c? c2., of the main grate sectionC, or between one of the end bars c and its neighboring cross bar c2, isthe catching piece d, shown in full lines in Figs. l and 3, andindicated by dotted lines in Fig. 2.] This catching piece is preferablymade integral with bars Ae. and c2, as;

shown in Fig. 1, and is out of contact with the radial bar or finger ewhen both Athe main l grate section C and the sub-grate section E are inhorizontal positions as shown in Fig. 2,

and allows the said sub-grate section lto be oscillated alternately, inopposite directions, t

sub-grate section is continued, the finger or bai' e, beneath said piececl, will co-act with `the latter to throw the front side portion of themain grate section downwardly, as illustrated in Fig. 3and thereby dumpthe same, v when the materials on the grate bed will readily slidedownwardly and ed.

If preferred, there may be provided at vthe outeredges of vthe bars c c,of the main grate section C, short projections c3 e5., integralwith saidbars and extending to within ashort disg tance from the grate frame B asshown. l

By myabove described improvements, the main grate section v'may beallowed to remain Q in ahorizontal position for any desired length l oftime, while the bars of the sub-grate seetion -inay .be oseillated, atwill, vfor so loosening the ashes and clinkers, as to cause them, in alarge measure, to fall down between the bars c2 c2 of the main gratesection. The shaft D is, at all times, preservedfrom contact with thefire, so that it will not become bent or warped; and, by a suitablelength of movement of the sub-grate section past a vertical line, themain grate may be readily dumped. v

I-Iaving described my invention, what I claim, and desire to secure byLetters Patent, 1s

Inra grate for a stove, range or furnace, the combination with the grateframe B, provided with vthe stop b and the bearin-gs a a, a main gratesection C composed of bars c c and c2, as described, and provided withcatching piece d, and the downwardly projected bearings b b2, of thesub-section E, composed of shaft D, and radial bars e all below the saidmain grate section, Athe said shaft being supported inthe said bearingsva, caofI the grate frame, and rolling in 'bearings b b2 provided withthe main grate section, and having an end thereof provided with meansfor engaging with an operating lever, all substantially as and for thepurposes set forth.

In testimony that I claim Vthe invention above set forth I aix mysignature in presence of two witnesses.

HERMAN GRAEF.

Witnesses: i

CHARLES .SELKIRL A. SELKIRK, J r.

